[s-cars] Ideas to Increase mpg?

Sun Jun 14 13:34:13 PDT 2009

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Jerry,

As long as the pull-out OEM chip is not damaged and the pins are 
pretty clean and more or less free of solder residue then putting it 
back into a socketed ECU is no problem.  What may be a small problem 
is that chip upgrades usually include a three bar pressure transducer 
change from the OEM 2.5 bar PT.  That must also be reversed.  No big 
deal if you have or can get one of the 2.5 bar PTs.  They are readily available

Bob

At 03:57 PM 6/14/2009, Jerry Scott wrote:
>*This message was transferred with a trial version of CommuniGate(r) Pro*
>Dave
>I'm not sure that you can put the original chip back, since the after market
>chip was probably put into a socket that was soldered in.  The original chip
>might fit the socket, but I'm almost sure that it was originally soldered
>directly to the circuit board.
>Jerry
>----- Original Message -----
>From: "David Kase" <dkase at dorma-usa.com>
>To: "Tom Green" <trgreen at comcast.net>; <s-car-list at audifans.com>
>Sent: Saturday, June 13, 2009 9:13 PM
>Subject: Re: [s-cars] Ideas to Increase mpg?
>
>
> > Hah!  Indeed "respectfully" is my slow transition back into the
> > irresistible S-list...
> >
> > Indeed, keep your foot out of it.  That makes the biggest contribution I
> > have seen in my B5.
> >
> > I will investigate the fuel mileage thieves you have mentioned.  O2
> > sensors I am sure are gone, the ignition is fresh but I will check for
> > leaks in the intake. This is a new path for me and I believe worthwhile.
> > I don't think I will give up on the C4 just yet.  The kids and wife like
> > it so I might as well embrace it.
> >
> > AFA the chips - I was just thinking of replacing the whole thing with a
> > stock ECU.  Seems to messy and chancy to try an chip swap again.
> >
> > I appreciate your reply and candor.
> >
> > Dave
> >
> >
> >
> >
> > -----Original Message-----
> > From: s-car-list-bounces at audifans.com on behalf of Tom Green
> > Sent: Sat 6/13/2009 9:10 AM
> > To: s-car-list at audifans.com
> > Subject: Re: [s-cars] Ideas to Increase mpg?
> >
> > Ok, what did you do with the real Dave Kase?  He couldn't even spell
> > Respectfully.  : )
> >
> > I don't think you see much here on mpg because it's difficult to
> > compare, so usually meaningless.    You have this S6 with little
> > invested in it, so I can see it is tempting to think you
> > can essentially get a free vehicle by changing cars.  But, I think the
> > reality is different if you move to an unknown.  The fuel savings is
> > so dependent on the price.  If you are making
> > a purely economic decision, just ride the bus.
> >
> > I think you can get to 25 mpg average for your commute since you can
> > generally avoid stop and go driving.  I would start with the basic
> > tune of the engine before I would spend
> > money on the ECU.  You can probably find some stock chips for little
> > dough, but are they socketed? Are the TAP chips socketed in the ECU?
> > Who is going to do this swap?  How
> > much?  It's going to take a lot of commute to pay for the swap so can
> > you expect enough gain in mpg?
> >
> > I would look elsewhere for the culprit that is stealing my mileage.
> > If it is your right foot, at least you are getting something for your
> > money.  Faulty temperature sensors, O2 sensors,
> > dirty injectors, dirty MAF and intake, leaking vacuum hoses, etc. rob
> > the mileage with nothing in return, and these are areas you can attend
> > to without paying labor costs.  There is also the added benefit in
> > performance and longevity for the well tuned engine.  I admit that
> > payback for a few parts can be lengthy at 5 mpg, but you have
> > immediate benefits in the performance too.
> >
> > Tom
> >
> >
> >
> >> -----Original Message-----
> >> Date: Fri, 12 Jun 2009 21:32:23 -0400
> >> From: "David Kase" <dkase at dorma-usa.com>
> >> Subject: [s-cars] Ideas to Increase mpg?
> >> To: <s-car-list at audifans.com>
> >> Message-ID:
> >> <058B1C4576896745AB96826AB59CFC380879A9 at rmdc2.usa.dgna.net>
> >> Content-Type: text/plain; charset="iso-8859-1"
> >>
> >> I did a 7 month search in the archives and did not see a thread
> >> related to fuel mileage.
> >>
> >> I am keeping my B5 S4 as a secondary car and am currently doing some
> >> upgrades to it.  My recently purchased S6 is doing dd duty.  I have
> >> a 60 mile round trip each day and at 20 mpg, I could stand better
> >> fuel mileage.  I do 55 of the 60 miles on the open highway.
> >>
> >> I was thinking of selling the C4 and buying a TDI (saving ~$100/
> >> month) but I just don't think I will enjoying driving it everyday
> >> (Probably a 99-02 Jetta).  I also am considering a 1.8T A4.  But, I
> >> figure if I can get the mileage better in the S6 then I will just
> >> keep it.  I'd love to get over 25 mpg but I don't know if it is even
> >> possible.
> >>
> >> Step 1 - go from CRAP (TAP) ECU to stock.  Then what?
> >>
> >> No matter what I do I know I will be rolling on the power from time
> >> to time.  It seems like you can never get that mileage back over a
> >> tankful.
> >>
> >> Respectfully,
> >> Kase
> >
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>
>
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